Loom shuttle positioner



Mardi 4, 19141. W R HEWTON 2,234,049

LOOM SHUTTLE POSITIONER Filed May 25, 1959 2 SheetS-Sheet 1 INVENTOR l WlLLIAM l2. HEWTON. BY p /Ha@ ATTORNEY March 4, 1941. w, R- HEWTON Loom SHUTTLE PosITIoNER Filed mayv 25, 1939 2 Sheets-Sheet 2 INVENTOR WILLIAM Q. HEWTON Patented Mar. 4, 1941 UNITED STATES PATENT CFFICE LOOM SHUTTLE POSITIONER Application May 25, 1939, Serial N0. 275,588

8 Claims.

This invention relates to shuttle positioners which are particularly designed for use on looms of the bobbin changing type.

Difficulty is encountered in keeping shuttles, particularly the lower shuttle of a pair of simultaneously cross picked shuttles, boxing in accurate alignment with the replenishing mechanism. The difculty is increased by the observers inability to study the operation as the upper shuttle box compartment practically conceals the lower shuttle after it is boxed.

Various devices have been provided to align shuttles for bobbin replenishment, but insofar as I am aware none have been entirely satisfactory. The inner tip pusher type of shuttle positioners, for example, acting as they do on the shuttle tip adjacent the fabric are ineffective to accurately position shuttles when the picker becomes worn or when the shuttle is boxing too deeply for any other reason.

According to my improvements I provide a simple and effective means to accurately align a shuttle with bobbin replenishing mechanism regardless of whether the shuttle is boxing too deeply, not deeply enough or rebounding. I accomplish these results Without resorting to the use of smaller bobbins or in any way interfering with the normal bobbin transfer operation. I do this by mounting a cam dagger actuated unit on the oscillating or reciprocating shuttle box at the transfer side of the loom. The unit comprises pegs or fingers, pairs of Which are secured to different spring pressed pivoted arms. The pegs or fingers and arms are laterally movable against a spring. Immediately upon the disengagement of the unit and the dagger, the springs act on the pivoted arms to reset the unit and permit picking of the shuttle without interference of shuttle positioning parts. The cam dagger is conveniently arranged on a xed portion of the loom frame to engage a pair of rollers. approaching front center, engagement of the cam dagger and the pair of rollers causes the arms to which the pegs are secured to pivot about their centers to a xed stop and the pegs to pass through a slot or recess in the shuttle wall or body. Further forward movement of the lay and engagement with the dagger moves the pegs laterally apart from one another and the shuttle either inwardly or outwardly, depending on whether it is boxed too deeply or not deeply enough. The pivotal movement is preferably suicient to permit a peg or the pegs to engage a shuttle, but is insuicient to move them into the shuttle bobbin chamber.

As the lay is An object of this invention is to provide a shuttle positioner which moves an improperly boxed shuttle either inwardly or outwardly as re-` quired.

Another object is to provide a shuttle positioner with laterally moving shuttle engaging parts.

Another object is to provide a shuttle positioner which engages a shuttle recess or slot to effect lateral movement of a mispositioned shuttle.

Another object is to provide a shuttle positioner which does not enter the bobbin chamber to any material extent.

Another object is to provide a shuttle positioner which is operable on double shuttle looms.

Another object is to provide a shuttle positioner which will position either or both shuttles of double shuttle looms of the type in which the shuttles are simultaneously picked in the same or opposite directions through superposed sheds.

Another object is to increase the efficiency of replenishing looms.

These and other objects of invention will be manifest from a consideration of the following description and accompanying drawings in which;

Fig. I is a top plan view of the shuttle positioner mounted on the lay of the loom.

Fig. II is a side elevation, partly in section on line A-A of Fig. I, of an embodiment of my inventon applied to a double shuttle bobbin replenishing loom.

Fig. III is a detail assembly of one side of the shuttle and of the actuating cam dagger.

Referring to the drawings in which like parts are referred to by like numerals in the several gures, Fig. II illustrates my improvements applied to a double shuttle loom of which III is the oscillating lay. Shuttle box II, reciprocating with the lay I has a front wall I2 and back wall I3 which divide the shuttle box into two compartments, onefor the top shuttle Il! and the other for the bottom shuttle I5. It is'to be understood that a bobbin may pass vertically through both compartments and the lay III at replenishing. The bobbin transferrer head at I8 cooperates with weft replenishing means which may be the same or similar to that disclosed in Letters Patent of the United States No. 2,136,331. A new full or partially full weft bobbin is inserted in the position of the bobbin I9.

Secured to the forward side of the lay I0 is a guide plate having a T shaped track 2 I. A pair of carriages 22 and 23 are slideable along the track 20 and are yieldably connected to each other by the spring 24 the free ends of which are looped through holes in projections 25 and 26 of the carriages 22 and 23.

Pins 21 and 28 act as pivots about which arms 29 and 3|) turn. Stops 3| and 32 limit the forward movement of the free ends of the arms 29 and 3U by contacting the faces of the carriages 22 and 23. The free ends of these arms are bifurcated for receiving rollers 33 and 34 which can revolve about pins and 36, VEach of the arms havean offset upstanding plate-like position 31 and 38 to which is conveniently securedpairs of pegs 39, 40, 4| and 42 respectively,

which move the shuttlesi4 and I5 when re-,

quired, to properly position them.

the arms 29 and 30, their rearward movement being limited by roller stops 43 and 44 which are positioned by pins and 45. Small compression springs 41 and 48 normally hold the stops 3| and 32 against the carriages 22 and 23 and the free ends of the pegs clear of the path of the shuttles (Fig. I)

When the pivoted cam dagger 49 engages the rollers 33 and 34, lthe pegs move rearwardly until the arms meet the roller stops 43 and 44 and then the carriages 22 and 23 move laterally apart against thetension of spring 24. The rearward movement of the arms causes the pegs to pass through slots in the front shuttle box walland into a slot in whatever shuttle or shuttles are in the shuttle box compartments. The pegs are so proportioned that .they do not enter the bobbin chamber but merely enter the shuttle slot so that they may position the shuttle by engagement with either side of the shuttle slot during the lateral movement of the pegs. This insures that bobbin replenishment of either a lower or'upper shuttle will be effected without interference of shuttle positioning parts.

On bobbin replenishing looms, cam dagger 49 need engage the rollers 33 and 34 on the replenishing strokes only and to accomplish this I provide a rest pin 5|) on which the pivoted cam dagger -49 may rest in a.p0sition below the level of the rollers, 33 and 34 during normal weaving.

At the call for' replenishment the shaft 5| is moved one of two distances as is set out in the beforementioned Letters Patent of the United States No. 2,136,331 so that one or the other of teeth 52 and 53 of a member 54 secured to the shaft 5| will engage the hook 55. A second member 56 also secured'to the Shaft 5| has an adjustably mounted roller 51 for engaging a short arm 58 which together with the cam dagger is loose on pin 59. A spring 60 (Fig. II) mounted on ofiset portions 6| and 6 2 operatively connects the loosely mounted armand cam dagger. A stop 63 integral with the short arm overhangs the dagger and keeps the spring 6|] in position and the short arm from swinging freely. The knife rail 64 is on the loom frame and supports brackets 65 and mispositioned shuttle either inwardly or outwardly as required without resorting to complicated mechanism, reducing the size of the shuttles or providing special shuttles. Allthat is required of the shuttle and shuttle box structure is that a slot be provided in the shuttle wall which is in alignment with a slot or slots in the shuttle box wall.

The cam dagger is arranged to give the desired extent of lateral movement, it being understood that conventional protector mechanism will stop the loom in such cases as when the shuttle fails to enter the box or rebounds violently.

Having described my invention in a preferred.t

embodiment I claim:

1. In a bobbin replenishing loom having a lay, a shuttle box mounted on the lay and a recessed shuttle, the combination of parts comprising shuttle positioning means movable into the shuttle recess and then laterally in opposite directions in the recess to engage either side wall of the recess to move the shuttle to a position in replenishing alignment with bobbin replenishing loom parts.

2. In a loom having a lay, a shuttle box and a shuttle having an unobstructed recess, shuttle positioning means mounted on the lay, said means comprising a pair of lingers movable into the unobstructed shuttle recess and then laterally apart therein, said lateral movement being suflcient to cause a finger to engage a wall of the recess and to move a mispositioned shuttle to a desired position, and an actuator for the shuttle positioning means. Y

3. `In a loorn having a lay, a shuttle box and a recessed shuttle, shuttle positioning means comprising a pair of elements movable into the shuttle recess, Ia pivoted arm mounting for each element, a carriage for each pivoted arm, means for holding the carriages in pre-determined spaced relationship, and means for moving an element, arm and carriage laterally of the other element, arm and carriage, whereby an element may engage a wall of the shuttle recess to move a mispositioned shuttle to a desired position.

4. In a loom having a lay, a shuttle box and a recessed shuttle, shuttlek positioning means mounted on the lay, said means comprising a pair of elements movable into the shuttle recess, a pivoted arm mounting for each element, a carriage for each pivoted arm, means for holding the carriages in predetermined spaced relationship, and means for moving an element, arm and carriage laterallyof the other element, arm and carriage, whereby an velement may engage a wall of the shuttle recess to move a mis-positioned shuttley to a desired position.

5. In a loom having a lay, a shuttle box and a recessed shuttle, shuttle positioning means comrising a pair of elements movable into the shuttle recess, a pivoted spring pressed arm mounting for each element, a carriage for each pivoted spring pressed arm, means for holding the carriages in predetermined spaced relationship, and means for moving an element, arm and carriage laterally of the other element, arm and carriage, whereby an element may engage a wall of the/shuttle, recess to move a mispositioned shuttleto a desired position.

6. In a loom having a lay, a shuttle box and a recessed shuttle, shuttle positioning means mounted on the lay, said means comprising a pair of elements movable into the shuttle recess, a pivoted arm mounting for each element, a stop fory the pivoted arm, a carriage for each pivoted' arm, means for holding the carriages in predetermined spaced relationship, means for moving an element, arm and carriage laterally of the other element arm and carriage, and means for moving the elements into the shuttle recess.

'7. In a loom having a lay, a shuttle box and a recessed shuttle, shuttle positioning means comprising a pair of elements movable into the shuttle recess, a pivoted spring pressed arm mounting for each element, a stop for each spring pressed arm, a roller on each spring pressed arm near the free end thereof, a carriage for each pivoted spring pressed arm, means for holding the carriages in predetermined spaced relationship, and a dagger for engaging the rollers and for moving the elements into the shuttle recess and laterally in the recess to move a mispositioned shuttle to a desired position. v

8. In a loom having a combination set forth in claim 6, further characterized in that the shuttle positioning means automatically resets itself as the lay moves away from front center.

WILLIAM R. HEWTON. 

